The brain itself is the least sensitive major organ to pain because it lacks pain receptors (nociceptors), allowing for awake brain surgery, but the skin areas with the fewest touch receptors, like the upper back, forearms, and outer thighs, are the least sensitive parts of the body to touch. Hair and nails are also insensitive as they are made of dead tissue, while certain cells like nerve fibers are less sensitive to radiation.
Top 5 Least Sensitive Areas on the Human Body
We must remember that the most delicate organ in the human body is the brain. Brain is one of the largest and most complex organs of the human body and is made up of more than 100 billion nerves. Brain controls speech, thought, memory, movement and helps in the functioning of many organs in the human body.
In contrast, the anterior thigh, posterior neck, and forearm have fewer dense sensory receptors and an inability to distinguish two points. Overall, the palm and cheek are identified as the most sensitive skin areas, while the thigh and forearm are the least sensitive.
The brain itself does not feel pain because there are no nociceptors located in brain tissue itself. This feature explains why neurosurgeons can operate on brain tissue without causing a patient discomfort, and, in some cases, can even perform surgery while the patient is awake.
Detailed Solution. The correct answer is Brain. Brain organs will not feel any pain on being pricked by a needle. The brain is a painless organ.
Congenital insensitivity to pain is a rare disorder, first described in 1932 by Dearborn as Congenital pure analgesia. Congenital insensitivity to pain and anhydrosis (CIPA) is a very rare and extremely dangerous condition. People with CIPA cannot feel pain [1].
Clitoris. It's common knowledge that the clitoris is one of the most sensitive spots on a woman's body. The clitoris is the most powerful of all female erogenous zones. It has 8,000 nerve endings that ultimately make it the powerhouse of pleasure.
Two of the important body parts are nails and hair. These are made of special tissues. We don't feel anything when we cut our nails and hair.
For most females, the most sensitive and important erogenous zone is the clitoris. Many females require clitoral stimulation to orgasm. For some, stimulation of the G-spot may indirectly stimulate the clitoris or its roots, which extend into the vaginal wall.
About 75% of your brain is water, making hydration crucial for sharp thinking, focus, and mood, as even mild dehydration (losing 2% of body water) can impair memory, concentration, and reaction time. The remaining part of the brain is mostly fat, and this water content is essential for creating neurotransmitters and supporting brain function.
The human body is approximately 99% comprised of just six elements: Oxygen, hydrogen, nitrogen, carbon, calcium, and phosphorus. Another five elements make up about 0.85% of the remaining mass: sulfur, potassium, sodium, chlorine, and magnesium. All of these 11 elements are essential elements.
The participants included young, healthy and physically active women (n = 100) and men (n = 100). In the women and men, the highest Tmean temperatures were found on the trunk. The warmest were the chest and upper back, then the lower back and abdomen.
The glabrous skin of the hand and the forehead were the areas of highest spatial acuity, for both pain and touch. The gradients of spatial acuity for pain and touch were similar on the glabrous skin of the hand, whereas they followed opposite proximal–distal patterns on the hairy skin of the upper limb (Fig 4).
The skin is the most sensitive organ in our body which responds to touch, temperature etc. Skin is the largest organ of our body. It acquires an area of around 20 square feet in our body.
20 most painful conditions
Nociceptors are present in many body tissues but have not been found in articular cartilage, visceral pleura, lung parenchyma, pericardium, brain, and cord tissue.
Men's fingernails grow faster than women's nails. But, women's fingernails do grow faster during pregnancy due to hormones. Our fingernails have no feeling.
A kiss with the tongue stimulates the partner's lips, tongue and mouth, which are sensitive to the touch and induce sexual arousal. The sensation when two tongues touch—also known as tongue touching—has been proven to stimulate endorphin release and reduce acute stress levels.
The O-Spot is located farther within the vagina, near the cervix along the underside, i.e. towards the lower back, wall of the vagina.
More positively, the clitoral orgasm was labeled as a reliable companion, and viewed as easier to reach and more controllable than other kinds of orgasms: “The clitoral orgasm is the most pleasurable for me because I know what I like and how I like it, so I'm more likely to orgasm and have a sense of achievement” (No.
African–Americans report greater sensitivity (i.e., lower pain threshold) and reduced pain tolerance to a variety of quantitative sensory testing methods when compared with non-Hispanic whites, including thermal pain [21–24], cold pressor pain [25], ischemic pain [6], electrical stimulation [26] and, perhaps most ...
Trigeminal neuralgia. Trigeminal neuralgia is a chronic nerve pain disorder that causes sudden, excruciating facial pain.
But invertebrates do not feel pain because they have basic nervous systems and small brains. Peter Fraser, a marine biologist at the University of Aberdeen, says crabs and lobsters have only about 100,000 neurons, compared with 100bn in people and other vertebrates.